Update run-tests.sh

The old version used the deprecated ecukes binary in
elpa/ecukes-*/ecukes.

The new one is in
elpa/ecukes-*/bin/ecukes

The new method finds both and selects the non-deprecated one.
Merge pull request #104 from markus1189/master

Update run-tests.sh
Initialize packages in support

add `(package-initialize)` to `support/env.el`. This allows it to use
third party add-ons like e.g. `haskell-mode` to be activated during
tests if it is added as a dependency in the Carton file
Merge pull request #106 from markus1189/patch-1

Initialize packages in support
Move from Carton to Cask